The only immunoglobulin class with members able to cross the placental barrier is _________.

Question

Quizplus · Accepted Answer

IgG is the only immunoglobulin class that is able to cross the placental barrier from the mother to the developing fetus. This is important for passive immunity transfer to the newborn. IgA is found mainly in secretions such as saliva and breast milk, IgM is the first antibody produced in response to an infection, and IgE is involved in allergic responses.

The Only Immunoglobulin Class with Members Able to Cross the Placental